Oh, I am so very sorry about your reoccurrence and so terribly being stage 4 this time around. You are so very young! And to then feel like you can't get medical care. How far are you from a city that has appropriate care for you in the public realm? You need to go there. They often have care housing around such centers that whole families can stay at (Ronald McDonald house is the one in my area).
Can you in the mean time, have a CA 125 test? You could possibly do that at a lab and cost should be a couple hundred dollars. Should be, who knows what they do to jack up the costs. But that marker test would be helpful to know your numbers. This was the test that let my mother in law know that she was out of remission. A ct scan is said to cost between 80 and 350 without insurance according to costhelper. What about calling a hospital in your area who has social workers and professionals such as social workers who help patients navigate these things or the oncology office in your area for suggestions?
Again, I'm so sorry you are going through this and a mom's worst nightmare is leaving our precious children. hugs and stay in touch